Re: [CAD_CAM_EDM_DRO] Re: Big servo motors drive recommendations

At 12:32 PM 5/27/2007, you wrote:

>You mentioned that
>your motors were about 1 ohm resistance. Do you know the inductance?
>The PWM drives usually have a minimum inductance specification that
>will work with the PWM rate.

An interesting thought from an old analog engineer (late 1960s!), why
not put an inductor is series with the motor? It will degrade
performance if too large, but if it changes the problem, it may point
to the answer. Remember that noise is ALWAYS affected by the rate of
rise of signals...


David G. LeVine
Nashua, NH 03060